The solution to the optimization problem (REF ) is approached by its transformation into a convex QCQP that is solved by standard methods [1]}, [2]}. The details are shown in Appendix . The Pareto-optimal set of points given by solutions to the optimization problem for the given current supporting regions (a spherical shell, a cylindrical shell, and a box) are shown in Fig. REF , after applying normalization

n̰ = 2 Rc̰2 PL ,
